Optimal Vitamin B12 Dosage and Treating Deficiency B12 Injection Dosage and Frequency: 7 Essential Guidelines for Adults Liv Hospital When that Vitamin B12 injection kicks in , B12 helps boost your energy, improve mood, support brain function & metabolism, and even strengthen hair, skin + nails , Who doesnt love a healthy It might not be your lifestyle it could be a B12 deficiency. B12 is essential for energy, mood, and overall wellness and when levels are low, your body feels it. Our